<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <title>列表的过滤</title>
  <script src="../js/vue.js"></script>
</head>

<body>
  <div id="root">
    <h2>人员列表</h2>
    <input type="text" v-model="keyWord">
    <ul>
      <li v-for="(p, index) in filPersons" :key="p.id">
        {{p.name}}-{{p.age}}-{{p.sex}}
      </li>
    </ul>
  </div>

  <script>
    Vue.config.productionTip = false

    // 用watch实现
    // #region
    /* new Vue({
      el: '#root',
      data: { 
        persons: [
          {id: '001', name: '马冬梅', age: 19, sex: '女'},
          {id: '002', name: '周冬雨', age: 20, sex: '女'},
          {id: '003', name: '周杰伦', age: 21, sex: '男'},
          {id: '004', name: '温兆伦', age: 22, sex: '男'}
        ],
        keyWord: '',
        filPersons: []
      },
      watch: {
        keyWord: {
          immediate: true,
          handler: function(newValue){
            this.filPersons = this.persons.filter(person => {
            return person.name.indexOf(newValue) > -1
          })  
          }
        }
      }
    }) */
    // #endregion

    new Vue({
      el: '#root',
      data: {
        persons: [
          { id: '001', name: '马冬梅', age: 19, sex: '女' },
          { id: '002', name: '周冬雨', age: 20, sex: '女' },
          { id: '003', name: '周杰伦', age: 21, sex: '男' },
          { id: '004', name: '温兆伦', age: 22, sex: '男' }
        ],
        keyWord: ''
      },
      computed: {
        filPersons() {
          return this.persons.filter(person => {
            return person.name.indexOf(this.keyWord) > -1
          })
        }
      }
    })
  </script>
</body>

</html>